Home / 28,173.47-38,878.18-15,426.42

Finding the Fourth Proportional to 28,173.47, 38,878.18 and 15,426.42

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Solution

The fourth proportional to 28,173.47, 38,878.18 and 15,426.42 is: 21,287.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,173.47 : 38,878.18 = 15,426.42 : x
  2. Step 2: Convert to fraction form
    28,173.47/38,878.18 = 15,426.42/x
  3. Step 3: Cross multiply
    28,173.47x = 38,878.18 × 15,426.42
  4. Step 4: Simplify right side
    28,173.47x = 599,751,133.52
  5. Step 5: Solve for x
    x = 599,751,133.52/28,173.47
  6. Step 6: Final answer
    x = 21,287.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.